TLS Online TPP Program

#Question id: 18927


Which of the following statements, if any, is false?

#Unit 13. Methods in Biology
  1. The polymerase chain reaction (PCR) is a cell-free method of DNA amplification.
  2. PCR is usually used to amplify a specific DNA sequence of interest using oligonucleotide primers that bind to closely flanking sequences.
  3. PCR is superior to cell-based DNA cloning for two major reasons: it is much quicker and it allows much greater DNA amplification.
  4. PCR requires the use of a heat-stable DNA polymerase to make copies of the template DNA.
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TLS Online TPP Program

#Question id: 4793

#Unit 8. Inheritance Biology

Hypophosphatemia is caused by an X-linked dominant gene in humans. Normal man marries with Hypophosphatemia woman whose father is normal. What will be observation in their child is correct?

a. All daughters affected                                      b. half of their daughters affected

c. All sons affected                                              d. half of their son’s affected

TLS Online TPP Program

#Question id: 4794

#Unit 8. Inheritance Biology

 Following statement given for a character

A- Characteristics are determined by autosomal genes

B- Inherited according to Mendel’s principles

C-they are different expressivity in males and females

Which of the following having above statements feature?

TLS Online TPP Program

#Question id: 4795

#Unit 8. Inheritance Biology

 There is Gene A is normal growth while mutant allele a was shown to small size. A allele dominant over a allele.

Condition

Male Parent genotype

Female parent genotype

Offspring Phenotype

Maternal imprinting

AA

aa

i

Paternal Imprinting

AA

aa

ii

Genetic Maternal effect

AA

aa

iii

No Genomic Imprinting

AA

aa

iv


TLS Online TPP Program

#Question id: 4796

#Unit 8. Inheritance Biology

Trait is encoded by  genes that are expressed in only one sex . In domestic chickens, display a feather pattern in male and female

Genotype                        Male phenotype           Female phenotype

HH                             hen feathering                      hen feathering

Hh                         hen feathering                            hen feathering

hh             cock feathering (plumage pattern )         hen feathering

If cross between Hh and Hh. what is probability of their progeny with cock feathering

TLS Online TPP Program

#Question id: 4797

#Unit 8. Inheritance Biology

Non allelic genotype aa governing white phenotype with recessive epistatic over non allelic gene B for red phenotype Which of the following cross would produce 25 % white phenotype in their offspring? 

TLS Online TPP Program

#Question id: 4798

#Unit 8. Inheritance Biology

In goats, a beard is produced by an autosomal allele that is dominant in males and recessive in females. We’ll use the symbol Bb for the beard allele and B for the beardless allele. Another independently assorting autosomal allele that produces a black coat (W) is dominant over the allele for white coat (w). A cross allowed between BBbWw (male) X BBbWw (female). What is proportional of female progeny will beard with black coat?